Dyehouse

TRUPOTAN RB

polymer tanning agent

Basis:

Modified acrylic polymer.

Appearance:

Brown viscous liquid.

Charge:

Anionic.

Active matter:

Approx. 40 %.

pH value (1:10):

Approx. 7.0.

Hard water stability:

Excellent.

Chrome stability:

Not recomended.

Stability to electrolytes:

Excellent.

Light fastness:

Excellent.

Heat yellowing:

Excellent.

Properties

TRUPOTAN RB is a polymer tanning agent for application in the retannage processes where improved fullness and grain quality are required.

TRUPOTAN RB produces fine and tight grained leathers without reducing softness and is therefore suitable for application in all types of leather production e.g. white shoe upper leather, car upholstery and garment nappa leathers.

TRUPOTAN RB is fully water soluble and stable to salts and hard water and may be utilised across a wide pH range.

TRUPOTAN RB has excellent light and heat fastness properties.

TRUPOTAN RB can improve the buffing properties of nubuck leather production.

TRUPOTAN RB permits to obtain good levelling when dyeing with anionic dyestuffs and intensity is only slightly affected in comparation with other acrylic retanning agents.

TRUPOTAN RB shows good dispersing effect on vegetable and other reatnning agents, helping to obtain better distribution of chemicals on leather.

Application

In the neutralisation bath, leather processed as usual is then neutralised as follows:

150%

Water 35ºC.

 

2,0%

TRUPOTAN NS

 

0,5%

Sodium bicarbonate.

Run. 45 min – Ph 4,5-4,8.

4%-6%

TRUPOTAN RB

Run. 45 min.

 

Drain bath and proceed as usual.

In this way, leather will show improved fullness, fine grain and dyeings will show excellent levelling an best yield in terms of intensity.

Excellent results are obtained when combining TRUPOTAN RB with TRUPOTAN AMP in the neutralisation bath.

In the retanning bath, 3%-4% of TRUPOTAN RB may be applied before other retanning agents and dyestuffs in order to improve chemicals dispersion and fullness of leather.

In the fatliquoring bath, 2%-3% of TRUPOTAN RB is added after running the main fatliquor during 45 minutes and before acidic fixation. In this application, buffing will be specially improved. In this application it could be combined with TRUPOTAN GR in order to improve results.

Safety and storage

When handling TRUPOTAN RB, normal safety precautions associated with the handling of chemicals should be observed. For more specific details please refer to our safety data sheets.

TRUPOTAN RB can be stored for up to one year, if temperatures below 5 °C and above 40 °C can be avoided. On prolonged storage or extremes of temperature TRUPOTAN RB may exhibit some settlement which can be rectified by either warming and/or stirring the product thoroughly before use.

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